To cite package ‘nlopt’ in publications use:

Gonzalez-Rodriguez B (2023). nlopt: Call Optimization Solvers with .nl Files. R package version 0.1.1, https://CRAN.R-project.org/package=nlopt.

Corresponding BibTeX entry:

  @Manual{,
    title = {nlopt: Call Optimization Solvers with .nl Files},
    author = {Brais Gonzalez-Rodriguez},
    year = {2023},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=nlopt},
  }